#173A74#173A74

#173A74 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.8% C 0.108 H 260.0°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#173A74
RGB	rgb(23, 58, 116)
HSL	hsl(217, 67%, 27%)
HSV	hsv(217, 80%, 45%)
CMYK	cmyk(80.2%, 50%, 0%, 54.5%)
CIE-LAB	lab(25.16, 10.14, -36.97)
CIE-LCH	lch(25.16, 38.33, 285.33°)
OKLab	oklab(35.81% -0.0187 -0.1062)
OKLCH	oklch(35.81% 0.108 260)
XYZ	xyz(5.0176, 4.4686, 17.1177)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A74 #745117

analogous

#176974 #173A74 #221774

triadic

#173A74 #74173A #3A7417

tetradic

#173A74 #741769 #745117 #177422

square

#173A74 #741769 #745117 #177422

split-complementary

#173A74 #742217 #697417

monochromatic

#050D1A #0D2041 #173A74 #2154A7 #306ED6

Accessibility & contrast

On white

11.09

#173A74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173A74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A74

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A74	#FFFFFF	#000000	##FFFFFF
##173A74	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4076

Deuteranopia (green-blind)

#003873

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173a74;
/* rgb */ color: rgb(23, 58, 116);
/* oklch */ color: oklch(35.8% 0.108 260.0);

Tailwind

colors: {
  custom: {
    50: '#636f9c',
    500: '#173a74',
    950: '#000000',
  },
}

SCSS

$custom: #173a74;
$custom-light: #636f9c;
$custom-dark: #000000;

JSON

{
  "hex": "#173a74",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 116
  },
  "hsl": {
    "h": 217.419,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.3581,
    "c": 0.10783,
    "h": 260
  },
  "luminance": 0.04469
}

Semantic roles & 50–950 ramp

primary

#173A74

secondary

#A9813D

accent

#A93EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173A74

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →